This circuit, found in a 1964 US documentation, consists of a selective amplifier that lets only 10 Hz pass around a 400 Hz center frequency with the indicated components.
This circuit is based on an unusual component today. It demodulates a 10.7 MHz FI signal and was...
We can also use the 4011 on this CMOS circuit that makes use of a crystal headset. The power...
This circuit is from the 1983 Intersil Databook. In it we have the use of the ICL7135 as an AD...